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在51单片机上实现RS485通讯，能够实现与上位机的通信(RS485 mode on 51 single, able to communicate with the host computer)

全自动可遥控旗帜升降系统以AVR单片机为核心，由PWM对电机进行变频调速，高精度光电编码器测速，闭环式电路控制。能够利用按键输入相应的指令控制旗帜的升降，还可以实现在特定位置停留的功能。利用LCD可以显示旗帜的实时高度和相应的控制命令，用LED指示旗帜是否处于半旗状态，具有语音提示报警功能，并可利用无线模块实现遥控功能，准确均匀地实现旗帜的升降(Automatic landing system can be remote-controlled flag to AVR microcontroller core of the PWM VVVF motor, high-precision optical encoder gun, closed-loop control circuit. Enter the appropriate button to take advantage of the command control of the rise and fall of the flag, but also can stay in the function of a specific location. LCD can display the banner of the use of real-time high and the corresponding control command, the LED is directed at the flag half-mast, and alarm functions with voice prompts, and the use of wireless remote control function module, to achieve uniform and accurate take-off and landing flag)

pic modified sine wave inverter circiut

AM2301显示温湿度并发送到串口，波特率为9600，可自己改，具体情况具体改进(AM2301Display temperature and humidity and sent to the serial port)

本方案是基于富士通高可靠性单片机开发的锂电池电动螺丝刀，采用直流无刷电机作为核心，配合方波驱动以及闭环控制技术，实现电动工具的可靠运行。 技术参数 1）采用日本富士通MCU，性能稳定，抗干扰强，高可靠性； 2）直流18V输入（可兼容不同锂电池10V—36V）； 3）三相霍尔直流无刷电机驱动，转速高达25000转/分； 4）采用德国英飞凌高性能MOS/IGBT，驱动功率高达800W； 5）高亮LED照明，工作时点亮，不工作时自动熄灭； 6）采用智能控制技术实现待机（不工作时）功耗为 0 消耗； 7）通过软件实现软启动，启动时间可调整，瞬间（1S）达最高速； 8）具有过流保护、堵转保护、过压欠压保护； 9）带速度设置按键、正反转按键、调速开关； (The program is based on the Fujitsu MCU development of high reliability lithium battery electric screwdriver, brushless DC motor as the core, with the square wave drive and closed-loop control technology, power tools for reliable operation.)

AD0809的功能启动，描述了如何启动AD0809的数模转换功能，并且在旁边加油注释(The AD0809 s function is activated, and describes how to start the AD0809 digital to analog conversion function, and next to the fuel comment)

由于太阳能充电系统多在户外，为了方便研究太阳能充电控制系统对蓄电池的充电情况，本文使用GPRS无线传输技术，设计了一套太阳能充电系统蓄电池的充电电压电流远程实时监测系统。系统的硬件部分由电压电流检测电路、单片机STC89C52RC、GPRS模块SIM300以及相应的外围电路构成，下位机软件由C语言编写并与硬件部分构成系统下位机部份，实现了对充电电压电流的信息采集以及数据的无线数传。上位机在LabVIEW2010环境下编写，具备友好的人机交互界面，实现了数据的远程接收、实时显示、数据库管理、报表生成和打印等功能。经过系统测试系统实现了对电压电流的远程监测。(As the solar charging system more outdoors, in order to facilitate the study of solar charge control system for charging the battery case, we use GPRS wireless transmission technology, we designed a solar charging system battery charge voltage and current remote monitoring system. The hardware part of the system by the voltage and current detecting circuit, microcontroller STC89C52RC, GPRS module SIM300 and corresponding peripheral circuits, lower computer software written in C language and hardware parts lower position machine part of the system, the realization of the charging voltage and current information collection and wireless data transmission of data. PC at LabVIEW2010 prepared environment, with friendly interactive interface, realize the remote receiving data, real-time display, management, report generation and printing. After the system test system enables remote monitoring of voltage and current.)

基于Cy7y168013USB接口芯片的逻辑分析仪keil源码(Logic analyzer based on Cy7y168013USB interface chip keil source code)

此程序例子是以C语言编写的一种实现烟花音乐效果的程序(The fire_work program example is written in C language to achieve a fireworks music program)

tree operation made by using c++